Distributed Gain Phased Array Antenna Systems
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Solution Overview
Problem
Conventional phased array antenna systems face challenges in achieving high fidelity RF signal amplification due to limited pad spacing and coefficient of thermal expansion issues, leading to reduced amplification and increased complexity, which degrades antenna performance.
Innovation Solution
A distributed gain function is implemented, integrating multiple module elements and non-element electronics into a single module, using distributed gain circuits and selectable signal delay circuits to provide amplification and compensate for insertion losses within the phased array antenna system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high amplification is implemented in conventional phased array antenna systems, then RF signal amplification is improved, but pad spacing limitations and thermal expansion issues cause increased complexity and reduced reliability
Solution Approach 1:
The amplification function is segmented into multiple distributed gain circuits positioned at different locations within the phased array antenna system. Each gain circuit provides localized amplification, distributing the total gain requirement across multiple stages rather than requiring a single high-gain amplifier. This segmentation reduces the complexity constraints on individual circuits while achieving the required overall amplification.
Solution Approach 2:
Distributed gain circuits serve as intermediary components between the antenna elements and the signal processing system. These intermediate amplification stages compensate for insertion losses in the signal path without requiring extreme high-gain amplifiers, thereby reducing the complexity and thermal management issues associated with high-power amplification.
2Ease of manufacture
If distributed gain circuits are integrated into a single module, then manufacturing cost and complexity are reduced, but integration of multiple functions into compact space becomes challenging
Solution Approach 1:
Multiple functional components including distributed gain circuits, selectable signal delay circuits, and antenna elements are merged into a single integrated module. This consolidation reduces the number of discrete components and interconnections, simplifying manufacturing and reducing overall system complexity while maintaining the required functionality within a compact form factor.
Solution Approach 2:
The integrated module is designed to perform multiple functions simultaneously: amplification through distributed gain circuits, time delay through selectable signal delay circuits, and signal routing. This multi-functionality reduces the total number of separate components needed, lowering manufacturing costs and simplifying the overall system architecture.
3Volume of moving object
If compact size constraints are imposed on phased array antenna systems, then system portability and integration are improved, but antenna performance parameters such as gain and noise figure deteriorate
Solution Approach 1:
Distributed gain circuits are strategically positioned at specific locations within the compact antenna module to provide localized amplification where insertion losses occur. This targeted approach ensures that signal quality and noise figure are maintained at critical points in the signal path without requiring the entire system to be oversized, thereby preserving antenna performance within compact dimensions.
Solution Approach 2:
Amplification is applied at multiple preliminary stages throughout the signal path rather than relying on a single final amplification stage. This distributed preliminary amplification compensates for losses early in the signal chain, maintaining signal integrity and noise figure performance within the compact module before signals are processed further.
Data Source
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AI summary
Systems and methods according to one or more embodiments are provided for a distributed gain function. The distributed gain function may be implemented, for example, as a second amplification stage to maintain amplification in an RF distribution network (218a, 218b, 220) of a compact high gain phased array antenna system. In one example, a system comprises a plurality of element circuits (213), each coupled to one or more antenna elements (536). Each element circuit (213) comprises a first amplification stage. A distribution network (218a, 218b, 220) configured to couple the plurality of element circuits (213). A distributed gain circuit (217) coupled to the plurality of element circuits (213) and the distribution network (218a, 218b, 220), wherein the distributed gain circuit (217) comprises a second amplification stage. The antenna elements (536) and the distribution network (218a, 218b, 220) are integrated in a substantially planar circuit board (539) and the plurality of element circuits (213) are coupled to the circuit board (539). Additional systems and methods are also provided.